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Muafi,University of Pembangunan Nasional Veteran, Yogyakarta
Journal of Industrial Engineering and Management | Year: 2015

Purpose: This study aims at analyzing the role of empowerment of Green Information Technology (IT) in Small Medium Entreprises (SMEs) and social capital of the creativity and innovation of creative SMEs in Bantul, Yogyakarta, Indonesia. Design/methodology/approach: A statistical technique used in the present study was Partial Least Square. The primary data of the present research were obtained from questionnaires and interviews with some respondents. While secondary data were gained through the records and publications of related instances. Findings: The research concluded that the empowerment of Green IT provides a significant role in creativity and innovation as well as social capital, and at the same time it also supplies a significant role in innovation. Research limitations/implications:. This study is proposed to fill the research gap and at the same time to emphasize the importance of the creative empowerment of SMEs in Indonesia in adopting Green IT and that they are not only ready to make use of Green IT. Green IT empowerment and social capital in the creative SMEs play an important function ingenerating of creativity and innovation in the Yogyakarta’s creative SMEs. Creative industries which capitalize creative ideas and skills are expected to positively contribute to support the national economy. Practical implications: Creative SMEs grow and develop rapidly here and form clusters of creative industries in accordance with the resources of each cluster. Originality/value: This paper is a first attempt to overlook the significant role of green IT empowerment in SMEs’ rapid development in Yogyakarta, a growing province in economic sector in Indonesia. The result of the study is expected to lead other similar research which in the future will craft out the role of economic development and the use of environmental friendly material of production. © 2015, Universitat Politecnica de Catalunya. All rights reserved. Source

Muttaqin Z.,University of Pembangunan Nasional Veteran, Yogyakarta
IET Conference Publications | Year: 2015

A quick, reliable reservoir characterization using core data must provide both geological and engineering works. The new proposed method of pore geometry-structure relating the hydraulic characterization of pore system can lead to improved reservoir characterization. This study is facilitated with 126 core samples of Well-A. PGS method is based on capillary model equation involving hydraulic parameter: effective hydraulic diameter and mean as geometry parameter and hydraulic conductivity as structure parameter. Plot of (k/ø)0.5 vs k/ø3 based on lithofacies description, each rock type will have distinct line whose slopes no more than 0.5 Then porosity-saturation-permeability correlations are formed to result equation predicting permeability from Well-A calibrated by SCAL data. It's demonstrated that cross-plot of the effective hydraulic diameter against porosity can be used to predict permeability. Permeability data distribution method as a comparison and PGS method were simulated in single Well model. It results 9 rock types which 5 of them have been validated with J-Function curve; the permeability prediction in which PGS method shows high accuracy (R2 = 0.9951); after simulated, PGS contributes RF 13.43% or is higher 5.46% against permeability data distribution method. It could be alternative reservoir characterization when using reliable core data that is beneficial in petroleum industry. Source

Yatini,University of Pembangunan Nasional Veteran, Yogyakarta
AIP Conference Proceedings | Year: 2013

The relationship between metal mineral content and induced polarization response is not well known. Mathematical and physical modeling in laboratory scale was applied to find out those relationship. Their relationship was obtained by curve mathching. The physical modeling data quality was very importand in obtaining the relationship, therefore accurate and precise measurements are needed. Physical modeling data quality depend on the type of electrode, measurement techniques and equipment. Therefore, it is important to know the characteristics of the utilized potential electrode materials. The results show that porouspot is the most excellent potential electrodes used for TDIP physical modeling. The obtained resistivity and chargeability of the TDIP response of the porouspot electrodes and copper electrodes are 16.11 Ohm-m and 0.015 mSec, and 16 Ohm-m and 0.36 mSec, respectively. It is concluded that the groundwater can be used in homogeneous isotropic medium approach and also it is a good method for host medium in physical modeling. © 2013 AIP Publishing LLC. Source

Suranto A.M.,Sejong University | Suranto A.M.,University of Pembangunan Nasional Veteran, Yogyakarta | Permadi A.K.,Bandung Institute of Technology | Bae W.,Sejong University | And 2 more authors.
International Journal of Oil, Gas and Coal Technology | Year: 2016

The irregular steam chamber propagation has been a problem in hybrid steam-solvent injection in heterogeneous reservoirs. When the steam chamber is poor, the solvent passes through to the production well directly. If the steam chamber is good, the oil drain will be effective. In such a case, controlling the hybrid steam-solvent injection is necessary to spread the steam chamber uniformly. A synthetic reservoir model was developed to study the phenomenon using a real field data set. Adjusting steam injection pressure, grouping perforations, and controlling the openings of perforation were observed. The adjustment from the peak of production rate is more favourable because the steam chamber has reached its maturity. Then, the solvent effectiveness increases and the solvent retention reduces. The heat efficiency and recovery factor are increased by 7.4% and 8%, respectively. The NPV on the adjustment from the peak of production rate increases by 9% compared with no-adjustment case. © Copyright2016 Inderscience Enterprises Ltd. Source

Suranto A.M.,Sejong University | Suranto A.M.,University of Pembangunan Nasional Veteran, Yogyakarta | Permadi A.K.,Bandung Institute of Technology | Bae W.,Sejong University
International Journal of Oil, Gas and Coal Technology | Year: 2016

Cyclic steam stimulation (CSS) has succeeded in recovering bitumen and heavy oil. However, after the fifth cycle, the process is no longer effective as indicated by the increasing cumulative steam-oil ratio (cSOR). This paper proposes an improvement to the CSS performance by modifying the completion design. The perforation interval is divided into two parts: upper section (for injection) and lower section (for production). In such design, the injected steam would condense due to heat loss. The steam would then flow to the lower section because of gravity force and the oil starts to produce. The injection-production cycle is managed by an interval control valve (ICV). Simulation results show that the proposed design would reduce the cSOR up to 30% and increase the cumulative oil production by 3.5 times. It is also revealed that the longer the distance between the injection and production sections, the better the steam efficiency. © 2016 Inderscience Enterprises Ltd. Source

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